Portable boat dock



FIG. 1 is a frontal isometric view of my portable boat dock, showing my new design;

FIG. 2 is a rear isometric view thereof;

FIG. 3 is a front elevational view thereof

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a top plan view thereof. 

CLAIM The ornamental design for a “portable boat dock,” as shown. 